Pyrite framboids in the Pennian-Triassic boundary section at Meishan, China: Evidence for dysoxic deposition

doi:10.1016/j.palaeo.2007.06.005

	Pyrite framboids in the Pennian-Triassic boundary section at Meishan, China: Evidence for dysoxic deposition
	Shen, Wenjie ; Lin, Yangting ; Xu, Lin ; Li, Jianfeng ; Wu, Yasheng ; Sung, Yongge
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2007-09-27
卷号	253 期号:3-4 页码:323-331
关键词	Pennian-Triassic boundary pyrite framboid dysoxia mass extinction
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2007.06.005
文献子类	Article
英文摘要	Pyrite framboid evidence from the Permian-Triassic global stratotype at Meishan, China, indicates the late Permian mass extinction is closely associated with a dramatic decline of benthic oxygen levels. Sizes and abundances of the framboids were determined from acid residues and in situ on polished sections of the samples. The framboids are abundant in the thin pyrite lamina on the top of Bed 24e (the upper layer of Bed 24), and Beds 25, 26 and 29, rare in Bed 24e and Bed 28, but absent in Bed 27. They have narrow size distributions with average diameters from 4.6 mu m to 8.7 mu m which are similar to those formed under anoxic/dysoxic conditions. The abundances and mean diameters of the pyrite framboids indicate redox conditions of deposition changing from upper dysoxia (Bed 24e) and lower dysoxia (pyrite lamina, Beds 25 and 26) to oxygenation (Bed 27), and again to upper dysoxia (Bed 28) and lower dysoxia (Bed 29). Our discovery confirms a worldwide dysoxic marine event during the Permian-Triassic transition, suggestive of a direct relationship with the Permian-Triassic marine mass extinction. (c) 2007 Elsevier B.V. All rights reserved.
WOS关键词	GLOBAL STRATOTYPE SECTION ; PERMIAN MASS EXTINCTION ; SOUTH CHINA ; IMPACT ; ANOXIA ; EVENT ; DISTRIBUTIONS ; FULLERENES ; ANTARCTICA ; AUSTRALIA
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000250255400005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/67484]
专题	中国科学院地质与地球物理研究所
通讯作者	Lin, Yangting
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Peoples R China 6.Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510640, Peoples R China 7.Chinese Acad Sci, Inst Geol & Geophys, Div Water Resource & Crust Fluid, Beijing 100029, Peoples R China 8.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Shen, Wenjie,Lin, Yangting,Xu, Lin,et al. Pyrite framboids in the Pennian-Triassic boundary section at Meishan, China: Evidence for dysoxic deposition[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2007,253(3-4):323-331.
APA	Shen, Wenjie,Lin, Yangting,Xu, Lin,Li, Jianfeng,Wu, Yasheng,&Sung, Yongge.(2007).Pyrite framboids in the Pennian-Triassic boundary section at Meishan, China: Evidence for dysoxic deposition.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,253(3-4),323-331.
MLA	Shen, Wenjie,et al."Pyrite framboids in the Pennian-Triassic boundary section at Meishan, China: Evidence for dysoxic deposition".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 253.3-4(2007):323-331.